@datadog/mobile-react-native/lib/module/utils/time-provider/TimeProvider.js

A client-side React Native module to interact with Datadog

/*
 * Unless explicitly stated otherwise all files in this repository are licensed under the Apache License Version 2.0.
 * This product includes software developed at Datadog (https://www.datadoghq.com/).
 * Copyright 2016-Present Datadog, Inc.
 */

/**
 * A Timestamp structure holding the
 */

/**
 * Simple class providing timestamps in milliseconds.
 * If available, it will use the `performance.now()` method, and will fallback on `Date.now()` otherwise.
 */
export class TimeProvider {
  /** Keeps an average offset between the unix time and the provided timestamp. */

  constructor() {
    const timestamp = this.getTimestamp();
    if (timestamp.reactNative == null) {
      this.baseOffset = 0;
    } else {
      this.baseOffset = timestamp.unix - timestamp.reactNative;
    }
  }
  now() {
    const timestamp = this.getTimestamp();
    if (timestamp.reactNative != null && this.baseOffset === 0) {
      this.baseOffset = timestamp.unix - timestamp.reactNative;
    }
    if (timestamp.reactNative == null || this.baseOffset === 0) {
      return timestamp.unix;
    } else {
      return this.baseOffset + timestamp.reactNative;
    }
  }
}
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